If you read the fellow's comments, he seems to be basing his judgement solely off the fact that they're losing money.
Yet by that standard, Tesla as well as Amazon are "awful businesses" too. He's not looking to the future, or closely examining why they're losing money.
Elon is the chairman of SolarCity, it was founded by his cousin and he is the largest private shareholder. Now after the shares have tanked in value he is buying it with new TSLA shares... This stinks to high heaven. If he really believes it is valuable he should have bought it himself, not with other people's equity.
As for why I think it's an awful business:
1) Huge amount of debt
2) Hugely negative free cash flow (-$790m last year)
Sometimes this can work, but it's absolutely the last thing Tesla needs (they need to put cash to work building out the battery factory and production of the Model 3, not subsidize solar panels).
But he's not abusing shareholders as you seem to think. He obviously believes Tesla stock is going to be fantastically valuable in years to come. He believes he's making the right move for everyone. And isn't that the CEO's job? To do what he believes is best? And do you think after the past decade of performance, this is where he's finally going to go wrong and steer it into the ground, after getting this far?
He wouldn't have done this if he hadn't carefully analyzed every aspect of the situation and concluded it could all be done. He's not just throwing dice in the air. Neither SpaceX nor Tesla could have done any of the things they've done if he was.
Yet by that standard, Tesla as well as Amazon are "awful businesses" too. He's not looking to the future, or closely examining why they're losing money.